CN86207666U - Far-infrared radiation and convection complex oven with single heat source - Google Patents

Abstract

The utility model discloses a complex oven which can simultaneously generate the irradiation and the convection effect in the oven through only adopting the single heat. The complex oven is suitable for heating the low temperature industry heating oven in the range of between 50 DEG C and 300 DEG C. For the complex oven only adopts the single heat, the improved complex oven has the advantages of high heat efficiency, remarkable energy saving effect, compact and reasonable structure, reliable baking quality, etc. The utility model can be widely applied in the fields such as the spray painting drying, the food and grain processing and drying, the papermaking, the dyeing and printing drying, the rubber plastic article of manufacture solidification, the medicine chemical industry, the low temperature metallothermic processing, etc.

Description

Far-infrared radiation and convection complex oven with single heat source

The utility model relates to a kind of improved far infrared baker, and particularly a kind of list kind thermal source that only adopts can be implemented in the compound baker that produces radiation and convection current in the stove simultaneously.It is that a kind of heated perimeter that is applicable to is at 5 ℃-300 ℃ low-temperature industrial heating furnace.

In the industrial production of every field, using oven, heating furnace widely, the mode of heating of this kind equipment has multiple, prove according to heat transfer theory analysis and long-term practice: the simple mode of heating that adopts based on hot air convection, characteristics are temperature fields and to add thermal effect even, but drying time is long, and the thermal efficiency is low; If the simple far infrared radiation that adopts is main mode of heating, characteristics are heat exchanger effectiveness height, and drying time is short, but it is inhomogeneous to be heated space temperature field, and the complex-shaped object that is heated is had the irradiation shade.For improving perfect to above-mentioned mode of heating, behind the seventies, proposed in stove, to adopt simultaneously the theory of radiation and the compound heating of convection current in the world, up to the present, produced the polytype equipment that adopts this compound heating advanced technologies both at home and abroad, as: the special far infrared radiation drying machine described in " spy opens clear 50-28055 " patent, coating drying device described in " spy opens clear 50-58625 " patent, and this class advanced composite heating process equipment that is just adopting in the recent period as units such as China's Nanjing Automobile Works, Shen Yang Carriage Factory.The above these equipment, except other common feature, one of them tangible common feature is to produce radiation and convection current double effect in the stove simultaneously for being implemented in, and what adopted all is two kinds of thermals source, be that a kind of thermal source provides radiant heat, another kind of thermal source provides advection heat.The utility model purpose is will provide a kind of need only adopt single thermal source can produce radiation and the dual fuel factor of convection current simultaneously in stove improvement structure baker of planting, this have through improved baker can improve the thermal efficiency, obvious energy conservation, furnace binding compact and reasonable.Advantages such as oven dry reliable product quality.

According to classical heat transfer theory calculating in modern age as can be known, the thermal source in the general heating furnace along with increasing of operating temperature, is pressed planck formula, and radiant heat energy increases progressively by the value-added 4 power gaining rates of element surface; Convection current heat energy only increases linear relationship by temperature and increases progressively.When temperature is 100 ℃, the ratio E spoke/E of radiant heat energy and convection current heat energy is right=and 0.66; When temperature reaches 300 ℃ E spoke/E right=7.4 its raise with temperature than difference and increase progressively situation and see following table for details:

Can find in low temperature range (in 300 ℃) by last table, the stove endogenous pyrogen simultaneously can produce the effective radiant heat and the advection heat of little Gong the utilization of heat energy ratio, particularly in the time of 200 ℃ E spoke/E right=1.04, almost equal.The present invention that Here it is only adopts single design considerations that thermal source can be realized compound heating of planting in low temperature range.

Task of the present utility model is achieved in that cuboid box-shaped stove of design, generally is advisable with height/length/width=1/0.55/0.5.Each face of body of heater (comprising fire door) is provided with heat-insulation layer.On other three facades except fire door, between heat-insulation layer inwall and hearth wall, the 50-100 mm wide distance of being separated by, make it on these three facades, all to form passage, each passage all with the hot blast inlet hole of forced circulation system that is installed in furnace roof portion and furnace bottom communications and liaison mutually, on three perpendicular walls of burner hearth, have many row of horizontal radiation window on each wall, radiation window shape size is close with tight edge tubular type far infrared heating thereon, the insert position of tubular type far infrared heating is in hot-air channel, be close on the radiation window, the infra-red radiation angle of penetrating from radiation window should be not less than 120 °, and radiation angle is good more near 180 ° more.The tubular type far infrared heating is when carrying out radiation from radiation window in burner hearth, in hot-air channel, make blower fan institute driven air in the forced circulation system, constantly be heated when flowing from top to bottom, form the convection current hot blast, the convection current hot blast enters burner hearth by the hot blast inlet hole after being flowed to the furnace bottom cavity, carry out heat exchange to being heated object from bottom to top then, cooling back hot blast continues to rise and enters forced circulation system, according to the different heating technological requirement, or enter atmosphere (contain flammable explosive gas object technology as baking and need discharging waste gas) by furnace roof portion aiutage, or entering hot-air channel once more continues to be heated and recycles.Being heated object can directly be advanced in the stove by the platform truck that a basis is heated the multilayer frame that the object geomery adapts, and can begin heating after closing upper furnace door.If eliminate radiation shadow fully and also can be designed to a rotary table by external control is set at furnace bottom, after object enters stove, slowly carrying out radiation and Convective Heating in the rotation, it is better to add thermal effect like this.The turntable size should be with when rotation, and object is not run into hearth wall and is as the criterion.For the heat exchange area And that increases hot air convection in the burner hearth makes it to form turbulent flow, increase the refraction effect of radiation simultaneously, hearth wall is made by the metallic plate that is pressed into transverse wave, is particularly made by aluminium sheet.Temperature monitoring and control in the stove, forced circulation system is controlled automatically by the independent switch board of another one, and switch board belongs to current techique and feature of the present invention does not have direct relation, is not described in detail.For being used to dry the heating furnace that can produce flammable explosive gas object purposes, when design, need adopt fire-proof motor and explosion-proof control technology simultaneously.According to foregoing invention characteristics and heating-up temperature accommodation, this compound heating furnace is adjusted the seriation industry baker that is designed to adapt to the different field purposes in proportion by temperature control and radiation and convection.In fields such as the oven dry of spraying paint, food grain drying, papermaking, printing and dyeing oven dry, the curing of rubber plastic goods, medicine, chemical products and metal Low Temperature Heat Treatment, good application prospects will be arranged.

The present invention is further described below with reference to accompanying drawing

Fig. 1 is a kind of concrete structure master of the present invention pseudosection

Fig. 2 is the top plan view of Fig. 1

With reference to Fig. 1, Fig. 2, present embodiment is one and has manufactured and designed the compound baker that finishes and drop into the inner special-purpose micro-machine paint-dipping drying that uses.A box compound baker of being furnished with independent switch board, body of heater (2) Nei Gemian (comprising fire door) is provided with heat-insulation layer (3).Be filled with compound insulating material alumina-silicate ceramic fibre felt and glass silk flosssilk wadding in the heat-insulation layer (3), hot-air channel (9) is on other three facades except fire door (10), formed with hearth wall (4) interval 80mm by heat-insulation layer inwall (12), hearth wall (4) is made by the metal aluminum sheet that is pressed into transverse wave.On these three hearth walls (4), every face has the radiation window (6) of top-down six row of horizontal directions, 18 tubular type far infrared heating (5) are in hot-air channel (9), tightly be set in accordingly on 18 radiation windows (6), these tubular type far infrared heating (5), both can from radiation window (6), in burner hearth (11), provide radiant heat by the radiation angle with 120 °, can constantly heat by furnace roof portion forced circulation system simultaneously again and drive flow air from top to bottom, formation convection current hot blast.Hot blast after micro-machine carries out heat exchange by baking, by in the pipeline of the forced circulation system of leading to the top (1) or drain, or continues to participate in circulation in furnace bottom hot blast inlet hole (13) enters burner hearth (11).

It is as follows that this compound baker is implemented important technological parameters:

Body of heater appearance and size length * wide * height=1600 * 1500 * 2800(millimeter)

Size of burner hearth length * wide * height=1200 * 900 * 1600(millimeter)

12 kilowatts of Rated power

380 volts of rated voltages

The number of phases 3

50 hertz of frequencies

Rated temperature 200 degree (Celsius)

Empty 1 hour stove heating-up time

Present embodiment is inner use after, compare with the old electric furnace of an original equal capacity, power is original 1/3, the dried time shorten of every bake oven 8 hours, save about electricity 500 degree, press separate unit motor stator oven dry power consumption conversion, every product can economize on electricity and 2.5 spend, by producing 20000 calculating per year, at least 20,000 5 thousand degree that economize on electricity the whole year, particularly the motor baking quality significantly improves, with this Kiln seasoned motor, tide attitude dielectric strength, withstand voltage index have been up to state standards and international (IEC) standard after tested. Its energy-saving effect, economic benefit, social benefit from then on embodiment have some idea of.

Claims (5)

1, the compound baker of a kind of far infrared radiation convection current, by body of heater [2] fire door [10], burner hearth [11], heat-insulation layer [3], forced circulation system [1], hot blast import orifice plate [7], thermal source [5] is formed, it is characterized in that making the thermal source that produces radiation and the compound heating effect of convection current in the stove simultaneously, only adopt single thermal source-a kind of tubular type far-infrared element [5] of planting, on three facades of the burner hearth except that fire door [10], the segment distance of between heat-insulation layer inwall [12] and hearth wall [4], being separated by, constitute hot-air channel [9], on three hearth walls [4], have many row of horizontal direction radiation window [6], in hot-air channel one side, each radiation window [6] tightens a dress edge tubular type far-infrared element [5].

2,, it is characterized in that forming the heat-insulation layer wall (12) of hot-air channel (9) and the distance between the hearth wall (4) is the 50-100 millimeter as the compound baker of far infrared radiation convection current of claim 1 defined.

3,, it is characterized in that hearth wall (4) made by the metallic plate that is pressed into transverse wave as the compound baker of far infrared radiation convection current of claim 1 defined.

4,, it is characterized in that hearth wall (4) made by aluminium sheet as the compound baker of far infrared radiation convection current of claim 3 defined.

5,, it is characterized in that furnace bottom is equipped with a controllable rotary table as the compound baker of far infrared radiation convection current of claim 1,2,3,4 defineds.

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